Improvement in muley-saw mills



UNITED STATES PATENT QFFICE.

THOMAS E. CHANDLER, OF INDIANAPOLIS, INDIANA.

IMPROVEMENT IN MULEV-SAW MILLS.

Specification forming part of Letters Patent No. 190,822, dated May 15,1877; applieationjiled April 14, 1877.

To all whom it may concern:

Be it known that I, THOMAS E. CHANDLER, of Indianapolis, in the countyof Marion and State of Indiana, have invented certain new and usefulImprovements in Muley-Saw Mills; and I do hereby declare that thefollowing is a full, clear, and exact description thereof, which willenable others skilled in the art to which it appertains to make and usethe same, reference being had to the accompanying drawings, and to theletters of reference marked thereon, which form a part of thisspecification.

The object of this invention is to improve that class of side-cuttingmuley-saw mills commonly called portable muleys, by substituting for theslides, which ordinarily govern the vertical movement of the lower endof the saw, a simple and efficient arrangement of devices that whollyrelieve the mill from the diificulty caused by the heating and wear ofthe lower slides arising from the shortness of the pitman we arecompelled to use in order to make a portable muley-mill having nearlyall its working parts attached to a solid iron frame, as shown in themill for which Letters Patent No. 157,734 were granted to me on the 15thday of December, i874, and upon which this present invention is animprovement; and the invention consists in the construction andarrangement of the several parts of the machine which guide and controlthe lower end of the saw, as will be hereinafter fully described, andthen specifically pointed out in the claims.

Figure 1 is a side elevation of the mill, showing the relativearrangement of the parts. Fig. 2 shows, in perspective, the principalparts which go to make this invention. Fig. 3 is a front view, partly insection, showing the frame which carries the saw and its operatingmechanism, with a vertical section through the attached log-carriage andtrack.

The iron frame A, which carries the saw, and .mechanism by which it isoperated, is cast in one piece, and is provided with a broad base, thatrests upon, and is secured to, a suitable foundation. Grossing thisframe, near its bottom, is the driving-shaft 13, provided at one endwith a crank or balance wheel, 0, in-

to which is inserted the crank-pin a, that gives motion to the pitman D.To the upper end of this pitman is secured, by means of the strap b anda suitable key and bolts, the journalbox as, within which oscillates thepin 0. To the two ends of this pin 0 are secured the radius-bars E andE, the opposite ends of which bars are pivoted to a bracket, F, which issecurely bolted to the inside track-timber G, at a point in front of thesaw nearly equal to the length of the pitinan, the object being to havethem so near the same length that the are described by one shallsubstantially equal that described by the other, so that during thedescent of the saw it shall move in a vertical line, while during itsascent it retreats a distance equal to the radius of the are describedby the ends of both pitman and radius-bars, thus insuring asteadydownward movement while the saw is in the act of cutting, and plenty ofclearance during its ascent.

Passing through the pitman, just below the pin 0, is the noddle-pin e,to the ends of which the bifurcated saw-straps d are attached. The upperends of these straps are secured by suitable bolts to the lower end ofthe saw, and therefore impart to it any motion which the noddle-pin mayreceive from the pitman and radius-bars. A guide-frame, H, is securelybolted to the main frame, and carries two vertical guides, g g, whichmay be formed of wood or other suitable material, and are so placed asto embrace the back of the saw from just below the cutting-point down toits lower end. Another pair of inclined guides,t' t, are secured to thetop of the frame H, and embrace the saw just below the log upon bothsides, coming forward nearly to the roots of the sawteeth, serving tosteady it in the cut, and also acting as a dust-shield to protect theparts below from the direct impingement of the sawdust as it is throwndownward from the log. To the front side of the guide-frame H the trackG is bolted, thus causing it, when once put in place, to always occupyits proper relative position with regard to the other parts of the millwithout further adjustment; and as the track G, which supports theopposite side of the carriage, is securely fastened to it by numerousgirts 0, secured to the tracks by suitable keys, it is, therefore,evident that no difficulty will be experienced in keeping this part ofthe mill in proper position for doing its work.

The log-carriage K is similar to those employed for the same purpose inmills using circular instead of reciprocating saws, and is usually madein sections, so as to be conveniently handled.

Having thus described my invention, I claim as new, and desire to secureby Letters Patent of the United States, the following:

1. The bifurcated saw-straps d, constructed and operating substantiallyas shown and described.

2. The bifurcated saw-str ps d, in combination with pitman, radius-rods,and bracket F, as and for the purpose set forth.

3. The iron frame A and guide-frame H, constructed as described, incombination with the vertical guides g and inclined guides t, as and forthe purpose specified.

In testimony that I claim the foregoing as my own I hereunto aflix mysignature in presence of two witnesses.

THOMAS E. I CHANDLER. Witnesses:

HERMAN O. WERBE, N. KELLOGG.

